I think Jimmy Williams is a bit overrated. If a team wants him to play CB, than he is worth a 10-15 pick. If they want him to play saftey he's gonna slip some more simply because he isnt a dominant saftey, like a Sean Taylor was coming out. I wouldnt be suprised if we go through the first 10 picks without a DB being taken.
As for the Raiders, i expect them to take either Mario Williams or AJ Hawk, if either falls to them. If not, i think they may look at Ngata for DT simply because Washington and Sapp are both getting old and Sapp has a pretty big cap hit. Plus, can you imagine 360 lbs of Washington and 340 lbs of Ngata in goal line defense

? Thats 700 lbs between the two of them which is probably more than the Denver and Atlanta offensive lines combined...